There are many natural caves of various sizes in the southern section of the Okinawa's main island. They are called Gama in the islands where during the midst of the Battle for Okinawa, they were used by both the Japanese army and Okinawan citizens’ for refuge from the fighting.
The cave of Todoroki is a natural cave in Itoman city. It consists of perpendicular and cylindrical doline with a center diameter of about 30 meters. The cave also has groundwater which flows through it. In it Okinawans faced the worst of both sides of the battle.
Then when surrender advice was not followed the US Forces, without distinguishing between Okinawan citizens and the Japanese army, threw the bombs or hand grenades into the cave. Later in the battle, Lieutenant-General Simon Buckner was killed in the by Japanese artillery bombardment at Maesato village on June 18, 1945. It is said that the US forces killed all of the civilians and POWs in retaliation.